问题
选择题
There are some boys ________ in the river.
A．swimming
B．to swim
C．are swimming
D．is swimming
答案
答案：A
A 考查固定句型。There be +名词 +doing sth.“有一些......正在做某事。”故选A。
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There are some boys ________ in the river.
A．swimming
B．to swim
C．are swimming
D．is swimming
答案：A
A 考查固定句型。There be +名词 +doing sth.“有一些......正在做某事。”故选A。
